Windows 11 Pro edition is not available in S mode. If your Windows 10 PC is running the Pro edition in S mode, you will need to switch out of S mode to upgrade to Windows 11 Pro. This is a one-way process, and once you have turned off the S Mode on your Windows, you will not be able to switch back to it. If your PC meets the minimum hardware specifications, the Windows 10 Home edition in S mode can upgrade to the Windows 11 Home edition in S mode. There’s no way to turn on the S Mode back again. Confirm it, and you will turn off S Mode In Windows 11. You will be headed to the Switch out of S Mode page on the Microsoft Store.Do note that you do not click on the Go to the Store option under the Upgrade Your Edition Of Windows. Click on the Go to the Store option you will find here.If you are using Windows 11 home, then you will see the Switch to Windows 11 Home section, and if you are using Windows 11 Pro, you will see the Switch to Windows 11 Pro section. This will depend on the version of Windows you are using. Now you will see the Switch to Windows 11 Home or Switch to Windows 11 Pro section. You can get more information about Windows S mode from the link below. If you want to install an app that isn't available in Microsoft Store, you'll need to permanently switch out of S mode. Afterwards, visit Mozilla's Firefox download page or the Microsoft. I am afraid that Windows 11 in S mode runs only apps from Microsoft Store. To learn more, see the Windows 10 and Windows 11 in S mode FAQ at Microsoft Support. To install Firefox, you must switch out of Windows S mode.

Now in the settings, head to the Update & security option, and then in the left sidebar click on activation. Although Firefox is available from the Microsoft Store, it does not work on Windows in S mode and installation is currently disabled.

Windows 11 home in s mode